Cerabar S/Deltabar S/Deltapilot S FOUNDATION Fieldbus Parameter description (Local operation and FieldCare)
Endress+Hauser 141
MEASURING MODE
Selection
Select the measuring mode.
The operating menu is structured according to the selected measuring mode.
!
Note!
When the measuring mode is changed, no conversion takes place. The digital output
value of the Analog Input Block OUT no longer displays the same value as the local
operation or the MEASURED VALUE. The device has to be recalibrated if the measuring
mode is changed. → ä 129, Section 10 "Flow measurement (via local operation and
FieldCare)".
Options:
• Pressure
• Level
• Deltabar S: Flow
Factory setting:
• Cerabar S and Deltabar S: Pressure
• Deltapilot S: Level
POS. ZERO ADJUST (685)
Entry
Position adjustment – the pressure difference between zero (set point) and the measured
pressure need not be known.
Due to the orientation of the device, there may be a shift in the measured value, i.e. when
the container is empty, the MEASURED VALUE parameter does not display zero.
Example:
– MEASURED VALUE = 2.2 mbar (0,033 psi)
– Correct the MEASURED VALUE via the POS. ZERO ADJUST parameter with the
"Confirm" option. This means that you are assigning the value 0.0 to the pressure
present.
– MEASURED VALUE (after pos. zero adjust) = 0.0 mbar
The CALIB. OFFSET parameter displays the resulting pressure difference (offset) by which
the MEASURED VALUE was corrected.
Options:
• Abort
•Confirm
Factory setting:
0.0
MAX. FLOW (311)
Entry
Enter the maximum flow of the primary device.
See also the layout sheet of the primary device. The maximum flow is assigned to the
maximum pressure which you enter via MAX PRESS. FLOW.
Factory setting:
1.0
MAX PRESS. FLOW (634)
Entry
Enter the maximum pressure of the primary device.
→ See the layout sheet of primary device. This value is assigned to the maximum flow
value (→ see MAX. FLOW).
Factory setting:
High sensor limit (→ see PRESS. SENS HILIM, → ä 198)
DAMPING VALUE (247)
Entry
Enter damping time (time constant τ).
The damping affects the speed at which all subsequent elements, such as the local
operation, measured value and OUT value of the Analog Input Block react to a change in
the pressure.
Input range:
0.0 to 999.0 s
Factory setting:
2.0 s or as per order specifications
Table 5: QUICK SETUP "Flow"
Parameter name Description
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